US2493046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency electroexpansive tuning apparatus
Assignee: Unisys Corp
•
Filing: 1944-07-13
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Granted: 1950-01-03
•
Expires: 1964-07-13
Abstract
No abstract record available.
Inventors
- 👤 Sigurd F Varian
- 👤 Edward L Ginzton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:27
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1559714A
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US1658953A
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US2162343A
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US2222902A
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US2216170A
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GB537518A
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US2311658A
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US2345642A
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US2414785A
Cited
US2408817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |